S Band 7 Bit Digital Attenuator Features Frequency Range: 2.8-3.8 GHz Low Insertion Loss 4 db(typ.) Max. Attenuation of 31.75 db RMS Amplitude Error < 0.3 db Input & Output Return Loss > 12 db 32 Lead 5.0 X 5.0 X 1.2 mm 3 QFN Package Functional Diagram Typical Applications Radar Military & Space Instrumentation Description The ASL3011P5 is a high performance MMIC 7-bit Digital Attenuator offering an attenuation range of 31.75dB in steps 0.25dB. The attenuator bit values are 0.25(LSB), 0.5,1,2,4,8 and 16dB (MSB) for a total attenuation of 31.75dB. The attenuator features an RMS error of less than 0.3dB over all 128 states with a maximum insertion loss of 4.5dB. The attenuator has an integral TTL driver facilitating a 7-bit control. The driver operates on +5/-5V voltages with minimal DC power consumption. Absolute Maximum Ratings 1 Parameter Absolute Maximum Units RF Input Power 27 dbm Positive Supply Voltage +6 V Negative Supply Voltage -6 V Control Voltage -0.5 to +5.5 V Operating Temperature -60 to +80 ºC Storage Temperature -65 to +150 ºC Junction Temperature(θJc) 106.6 ºC /W 1. Operation beyond these limits may cause permanent damage to the component Fax: +65 63360650 Page 1 of 12
Electrical Specifications @ TA = 25 o C, Zo =50, Parameter Min. Typ. Max. Units Frequency Range 2.8-3.8 GHz Insertion Loss 3.6 3.9 4.5 db Attenuation Range - 31.75 - db Attenuation Error - -0.4 to 0.6 - db RMS Amplitude Error 0.16 0.2 0.3 db Input Return Loss 12 18 25 db Output Return Loss 12 18 25 db Insertion Phase - -4 to +6 - Deg Input P1dB - 23 - dbm IIP3-40 - dbm DC Bias Voltages - +5, - 5 - V Control Voltages - 0 / +5 - V Note: 1. The above mentioned electrical specifications are measured on PCB mounted QFN package. 2. Input P1dB and IIP3 are measured for reference state at 3 frequencies points i.e., 3GHz, 3.3GHz & 3.5GHz. Fax: +65 63360650 Page 2 of 12
Test Fixture Data T A = 25 o C Fax: +65 63360650 Page 3 of 12
Test Fixture Data T A = 25 o C Fax: +65 63360650 Page 4 of 12
Test Fixture Data T A = 25 o C Fax: +65 63360650 Page 5 of 12
Test Fixture Data T A = 25 o C Fax: +65 63360650 Page 6 of 12
Test Fixture Data T A = 25 o C Fax: +65 63360650 Page 7 of 12
Test Fixture Data T A = 25 o C Fax: +65 63360650 Page 8 of 12
Test Fixture Data over the Temperature Fax: +65 63360650 Page 9 of 12
PIN CONFIGURATION PIN DESCRIPTION PIN Function Description 1-5V DC Supply Voltage 2,3,7-18,22,23,25 NC No Connection 5 RF IN RF Input 20 RF OUT RF Output 26-32 A6-A0 Attenuation Controls 24 +5V DC Supply Voltage 4,6,19,21 GND Ground Fax: +65 63360650 Page 10 of 12
PACKAGE OUTLINE DRAWING Note: All Dimensions are in mm. Fax: +65 63360650 Page 11 of 12
Truth Table for Prime States State Attenuation (db) TTL Control ( 1 = 3 to 5 V, 0 = 0 to 0.5 V ) A6 (16) A5 (8) A4(4) A3 (2) A2(1) A1 (0.5) A0 (0.25) 0 0 0 0 0 0 0 0 0 1 0.25 0 0 0 0 0 0 1 2 0.5 0 0 0 0 0 1 0 4 1 0 0 0 0 1 0 0 8 2 0 0 0 1 0 0 0 16 4 0 0 1 0 0 0 0 32 8 0 1 0 0 0 0 0 64 16 1 0 0 0 0 0 0 127 31.75 1 1 1 1 1 1 1 GaAs MMIC devices are susceptible to Electrostatic discharge. Proper precautions should be observed during handling, assembly & testing All information and Specifications are subject to change without prior notice Fax: +65 63360650 Page 12 of 12